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$450.00 USD
Estimated RRP $1,500.00

29.70cts ALEXANDRITE ROUGH TANZANIA COLOURCHANGE TBM-92

SKU
Dimensions (mm)
17.500 x 17.000 x 9.500mm
Weight (cts)
29.700
Treatment
No Treatment
Type
Rough
Colours

ALEXANDERITE BI-COLOUR TANZANIA-MANGHOLA DUMAWANGA DISTRICT ARUSHA REGION NICE GREEN CHANGES TO PURPLE FOR CABBING OR SPECIMEN TREATMENT-NONE This rare gemstone is named after the Russian tsar Alexander II (1818-1881), the very first crystals having been discovered in April 1834 in the emerald mines near the River in the Urals. The discovery was made on the day the future tsar came of age. Although alexandrite is a relatively young gemstone, it certainly has a noble history. Since it shows both red and green, the principal colours of old Imperial Russia, it inevitably became the national stone of tsarist Russia. Alexandrite is very scarce: this is due to its chemical composition. It is basically a chrysoberyl, a mineral consisting of colourless or yellow transparent chrysoberyl, chrysoberyl cat’s eye and colour-changing alexandrite (also in cat’s eye varieties). It differs from other chrysoberyls in that it not only contains iron and titanium, but also chromium as a major impurity. And it is this very element which accounts for the spectacular colour change. Rarely, vanadium may also play a part. According to CIBJO nomenclature, only chrysoberyls displaying a distinct change of colour may be termed alexandrite.

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Australia
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Rest of the world
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DHL $30.00 / 2 days $30.00 / 21 days
Rest of the world
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trueblueminerals
trueblueminerals
rare large gemstones and minerals
Mermaid Beach, Australia
Verified
806 Feedback

  • peketrain
    peketrain
    Positive

    Very pleased with the specimen and transaction

  • setillia
    setillia
    Neutral

    Responsive seller, which is appreciated. Lovely gem. The only issue was with shipping. I paid for post but it was sent via Fedex. Fedex (of course) charged me illegal fees over a month after delivery! This was why I chose post and not Fedex.

  • olga22220
    olga22220
    Positive

    Paid and shipped - no feedback left after 100 days

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Shipping Details

Shipping:
$30.00 14 days via Standard Shipping - Tracked
Ships from:
Australia

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Overview

Listing Type : Standard
Product ID : 1529214
Starts : 7th November 2024 08:11 am PST
* All prices are in USD